My wife and I ordered a pizza last Saturday afternoon while we watched the football game. A plain cheese pizza, and I also had a Greek salad made with iceberg lettuce.
Within about five hours I was having to make contributions to Trump’s Cabinet – diarrhea (probably more than you want or need to know.)
The point is - it had to be the lettuce. Iceberg lettuce is a risky green to eat raw this time of year. The heads are handled by the pickers, by the packers, by the transporters, by the produce department at the store, and finally by the person that makes the salad.
This time of year being flu season you would be safer to eat only cooked foods from restaurants, or if you must have a salad, one made only with locally produced greens.
Just a warning